Whether you’re an atheist or a Christian or some other sort of religious believer, there’s a good chance that one day you’ll find yourself in a church or other house of worship with traditions you don’t understand, surrounded by people whose beliefs you don’t share.

That’s especially true at weddings, baptisms, etc., where it’s likely there will be friends and extended family who don’t attend the same church (if they attend any at all). So don’t sweat it too much if you find yourself in such a situation. Even if you’re the only atheist there, you’re not the only fish out of water.

Different churches have different routines. There are sedate churches where the most you have to do is bow your head a few times, or (if you’re feeling ambitious) say some words (or move your lips). Then there are churches that practically give you an aerobic workout —…